Petrogenesis and Ore Genesis of the Lengshuiqing Magmatic Sulfide Deposit in Southwest China: Constraints from Chalcophile Elements (PGE, Se) and Sr-Nd-Os-S Isotopes

Petrogenesis and Ore Genesis of the Lengshuiqing Magmatic Sulfide Deposit in Southwest China: Constraints from Chalcophile Elements (PGE, Se) and Sr-Nd-Os-S Isotopes
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西南冷水青岩浆硫化物矿床岩石成因及成矿作用:亲铜元素(PGE、Se)和Sr-Nd-Os-S同位素的制约

DOI:
10.5382/econgeo.2018.4566
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发表时间:
2018-05
期刊:
Economic Geology and the Bulletin of the Society of Economic Geologists
影响因子:
--
通讯作者:
Li Chao
Li Chao
中科院分区:
其他
文献类型:
--
作者:
Yao Jun-Hua;Zhu Wei-Guang;Li Chusi;Zhong Hong;Bai Zhong-Jie;Ripley Edward M.;Li Chao

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冷水箐岩浆型镍铜矿存款产于扬子克拉通西缘中新元古代4个小型镁铁质-超镁铁质岩体中。含矿岩体侵位于新元古代早期变质火山-沉积岩、花岗岩和闪长岩中。侵入体主要由二辉橄榄岩、橄榄二辉橄榄岩、二辉橄榄岩和辉长岩组成,在侵入体下部有与超镁铁质岩有关的硫化物矿化。冷水箐含矿岩体中橄榄石晶体中镁橄榄石含量高达86mol%,表明其母岩浆经历了中等程度的分离结晶作用。岩体中的橄榄石晶体贫Ca(
The Lengshuiqing magmatic Ni-Cu ore deposit is hosted in four small mid-Neoproterozoic mafic-ultramafic intrusions in the western margin of the Yangtze craton in China. The ore-bearing intrusions were emplaced into early Neoproterozoic metamorphosed volcanic-sedimentary rocks, granites, and diorites. The intrusions are dominated by lherzolite, olivine websterite, websterite, and gabbro, with sulfide mineralization associated with ultramafic rocks in the lower parts of the intrusions. The forsterite contents of olivine crystals in the Lengshuiqing ore-bearing intrusions are up to 86 mol %, indicating that their parental magma experienced moderate degrees of fractional crystallization. Olivine crystals in the intrusions are depleted in Ca (
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